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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erp288
|2 doi
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|a pubmed24n0641.xml
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|a (NLM)19861653
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Benlloch-González, María
|e verfasserin
|4 aut
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|a K+ deprivation induces xylem water and K+ transport in sunflower
|b evidence for a co-ordinated control
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 09.03.2010
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a The effect of K+ deprivation on water and K+ transport in roots was studied in sunflower plants. Deprivation was achieved in two different ways: by removing K+ from the growth medium for varying intervals; and by growing plants permanently in a low-K+ medium. Removal of K+ from the growth medium for a few hours prompted a significant increase in xylem sap exudation, associated with an increase in root hydraulic conductivity; however, it did not give rise to any significant change in plant K+ content, nor did it favour root K+ exudation. By contrast, prolonged K+ deprivation led to a decline in the internal K+ content and stimulated water and K+ transport in roots. Leaf application of K+ (Rb+) in plants grown permanently in a low-K+ medium inhibited the effect of K+ deprivation on root water and K+ transport, without significantly modifying the internal K+ content of the plants. This treatment had no effect on normal-K+ plants. These results suggest the existence of mechanisms enabling perception of plant K+ status and/or K+ availability in the medium, which trigger transduction processes governing the transport of water and K+ from the root to the shoot
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Plant Exudates
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|a Solutions
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|a Water
|2 NLM
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|a 059QF0KO0R
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|a Potassium
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|a Fournier, José María
|e verfasserin
|4 aut
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|a Benlloch, Manuel
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 61(2010), 1 vom: 27., Seite 157-64
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:61
|g year:2010
|g number:1
|g day:27
|g pages:157-64
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|u http://dx.doi.org/10.1093/jxb/erp288
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